20225125 has 16 divisors (see below), whose sum is σ = 25929072. Its totient is φ = 15739200.

The previous prime is 20225123. The next prime is 20225137. The reversal of 20225125 is 52152202.

It can be written as a sum of positive squares in 8 ways, for example, as 2256004 + 17969121 = 1502^2 + 4239^2 .

It is not a de Polignac number, because 20225125 - 2¹ = 20225123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2439 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (1620567).

Almost surely, 2^20225125 is an apocalyptic number.

20225125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20225125 is a deficient number, since it is larger than the sum of its proper divisors (5703947).

20225125 is an equidigital number, since it uses as much as digits as its factorization.

20225125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425 (or 4415 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20225125 is about 4497.2352618025. The cubic root of 20225125 is about 272.4564360963.

Adding to 20225125 its reverse (52152202), we get a palindrome (72377327).

The spelling of 20225125 in words is "twenty million, two hundred twenty-five thousand, one hundred twenty-five".